/**
 * @func 1-Array.from(str)
 *    let str = 'hellow';
    console.log(Array.from(str));// ["h", "e", "l", "l", "o", "w"]

    before:
        let arr = [];
        let str = 'hellow'
        for(let i in str){
            arr.push(str[i])
        }
 * 
 * 
 */